Hello, is there a switch that I can use to rate limit the number of concurrent scans that are done with the portscan flag? I've loaded some 7 thousand IPs and its crashing every machine I run it from. I've tried multiple times running this from screen on my droplet and I can't get the scan to finish. I also am not recording any data it seems so even if it made it part way into the scan its not recording anything for me.

Love the tool so far, great for small one off scenarios.
Not sure the direction you want to go with this tool, but here's a couple ideas.

1. An option to remove targets, so you don't sweep invalid or incorrectly entered IP's

2. Have the tool validate if optional tools like Eyewitness, nikto etc are installed or not.
   Option to point to existing install, and or option to install from within goscan.

3. I noticed that the application suggests you need to enter IP's in the format of x.x.x.x/32
   However it accepts IP's in any form (including null/non-IP values) sanitize the inputs?

when trying to load a text file with IPs it crashes on Kali
`[goscan] > load target MULTI re
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x740884]

goroutine 1 [running]:
github.com/marco-lancini/goscan/core/cli.cmdLoad(0xc420160210, 0x3, 0x3, 0x4)
/go/src/github.com/marco-lancini/goscan/core/cli/executor.go:137 +0x114
github.com/marco-lancini/goscan/core/cli.Executor(0xc420096ce0, 0x14)
/go/src/github.com/marco-lancini/goscan/core/cli/executor.go:23 +0x14e
github.com/marco-lancini/goscan/vendor/github.com/c-bata/go-prompt.(*Prompt).Run(0xc420255c20)
/go/src/github.com/marco-lancini/goscan/vendor/github.com/c-bata/go-prompt/prompt.go:77 +0x688
main.main()
/go/src/github.com/marco-lancini/goscan/main.go:67 +0xee`

Broken links

Makefile (line 15)
go get github.com/golang/lint/golint
should be:
go get golang.org/x/lint/golint
The old link returns 404

All go files with imports pointing to
https://github.com/marco-lancini/goscan/core
need to be updated to
https://github.com/marco-lancini/goscan/goscan/core
The old links don't download any packages, as it says they are empty.

I forked the repo and tested on my Github account, to see if getting all the packages worked. It did work.

OS system: Ubuntu 20.04.4 LTS
Go version: 1.16.14

Hi Marco,

goscan looks very promising to me. Thank you for your development effort and publishing it as open source. 😃

I downloaded and use v.2.4 on a kali 2020.1 box and can provoke a crash using a incomplete command, just by leaving out the IP/target:

[goscan] > load target SINGLE
panic: runtime error: index out of range

goroutine 1 [running]:
github.com/marco-lancini/goscan/core/utils.ParseNextArg(...)
	/go/src/github.com/marco-lancini/goscan/core/utils/utils.go:116
github.com/marco-lancini/goscan/core/cli.cmdLoad(0xc420076760, 0x2, 0x2, 0x4)
	/go/src/github.com/marco-lancini/goscan/core/cli/executor.go:115 +0x764
github.com/marco-lancini/goscan/core/cli.Executor(0xc42025cce0, 0x12)
	/go/src/github.com/marco-lancini/goscan/core/cli/executor.go:23 +0x14e
github.com/marco-lancini/goscan/vendor/github.com/c-bata/go-prompt.(*Prompt).Run(0xc4200622a0)
	/go/src/github.com/marco-lancini/goscan/vendor/github.com/c-bata/go-prompt/prompt.go:77 +0x688
main.main()
	/go/src/github.com/marco-lancini/goscan/main.go:67 +0xee

I would expect an error message and no crash.
I can reproduce this crash.

i got this error while setting up -

root@kali:~/goscan/goscan# make setup
go get github.com/golang/lint/golint
go get golang.org/x/tools/cmd/goimports
go get -u github.com/golang/dep/cmd/dep
dep ensure
could not find project Gopkg.toml, use dep init to initiate a manifest
make: *** [Makefile:13: setup] Error 1

when i tried second time - i got this error

root@kali:~/goscan/goscan# make setup
go get github.com/golang/lint/golint
go get golang.org/x/tools/cmd/goimports
go get -u github.com/golang/dep/cmd/dep

cd /root/go/src/github.com/golang/dep; git pull --ff-only

fatal: unable to access 'https://github.com/golang/dep/': Could not resolve host: github.com
package github.com/golang/dep/cmd/dep: exit status 1
make: *** [Makefile:12: setup] Error 1

Hi,

Hi, thanks for your work.

Got an issue here where I tried to load an entire class C space addresses from a text file.

OS Used: Kali Linux

The format of that text file is:

192.10x.x.0
...
...
192.10x.x.255

The error message is:

[goscan] > load target MULTI targets.lst
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x830adb7]

goroutine 1 [running]:
github.com/marco-lancini/goscan/core/cli.cmdLoad(0x1aa12028, 0x3, 0x3, 0x4)
	/go/src/github.com/marco-lancini/goscan/core/cli/executor.go:137 +0xe7
github.com/marco-lancini/goscan/core/cli.Executor(0x1aa681e0, 0x51)
	/go/src/github.com/marco-lancini/goscan/core/cli/executor.go:23 +0x113
github.com/marco-lancini/goscan/vendor/github.com/c-bata/go-prompt.(*Prompt).Run(0x1aa85da0)
	/go/src/github.com/marco-lancini/goscan/vendor/github.com/c-bata/go-prompt/prompt.go:77 +0x548
main.main()
	/go/src/github.com/marco-lancini/goscan/main.go:67 +0xd2

Any ideas? thanks!

root@kali:~/Desktop/goscan/goscan# make setup
go get github.com/golang/lint/golint
go get golang.org/x/tools/cmd/goimports
go get -u github.com/golang/dep/cmd/dep
dep ensure
could not find project Gopkg.toml, use dep init to initiate a manifest
make: *** [Makefile:13: setup] Error 1

Since Go allows cross-compilation it would be great to generate releases for the main operating systems.

I am testing Goscan, which I really like so far. I loaded one IP and ran through the process. But I can’t load another IP or remove the previous IP, it shows the first IP. I can’t clear either. Is there a way to remove an IP once you have completed the goscan for that IP? Because of this issue, I am only able to use goscan once.

OWASP Amass would make a nice addition to your DNS enumeration, especially since it is written in Go!

https://github.com/OWASP/Amass

It would be nice to see goscan on brew so the installation would be really easy for mac users.

Cross compilation doesn't work on macosx.

Dep is deprecated and archived in favor of go modules.

This project is actually not working (binary - executable) or compiling on go version go 1.16.3 darwin/amd64.

The biggest problems, requiring mod files (not as important as some think if you are compiling or running locally - compile and write your code in a way that it doesn't burden the end user - make this an option or remove), remove DEP, make all the fancy imports of the terminal colors and memory optional. This is killing it moving forward - unless you want people to use an old system just to get things to work.