What do these ALG setting on my router mean, and what is ALG? 12 "ALG" here stands for "Application-layer Gateway" That is, firewall modules which cope with some peculiarities of those protocols On a stateful firewall, the "state" is usually tied to just addresses and port numbers That is, you send a packet from port X to server's port Y, and the firewall automatically allows the reverse back in
Why SIP-ALG in routers and modems? - Super User Without SIP-ALG you may have one-way audio on VoIP conversations (see below) Unfortunately the SIP-ALG in many routers is poorly implemented and causes more problems than it solves If you have one of these problem routers it is recommended that the SIP-ALG is disabled and other methods used to ensure VoIP works correctly
FTP passive server setup works when it shouldnt work The ALG mode: the server ignores passive port settings, if any, and generates a random port on its own on every PASSV command from client The router automatically opens this port
wireshark - SIP ALG detector - Super User I am trying to create a detector for SIP ALG I really just need to know what the BEST method of testing this is so I can write a program to test whether SIP ALG is enabled or disabled Thanks
Port 21 is open but I cant connect to FTP server - Super User It's rare to find a NAT gateway with FTP ALG code to allow a server behind the NAT to be reached via Passive FTP, but it's somewhat less rare to find a NAT gateway with ALG code to allow an inside client to reach an outside server via Active FTP Most modern FTP clients default to Passive FTP
Verifying the encryption cipher used in Kleopatra - Super User So AES is AES-128 Thanks for clarifying but how can I verify that is the cipher used in my encrypted file? Everything I've tried so far seems inconclusive unless I'm missing the obvious? I'd like to be able to verify users have encrypted a file meeting a given security policy (such as AES-128) Is algo 1 any kind of clue?
425 Unable to build data connection FileZilla, using windows 11 FTP . . . If your router has an "ALG" ("Application Layer Gateway") section or a "L7 protocol" section, it might be possible to change which ports are handled as "FTP ports" For passive mode, the ports can be defined statically on the server side Generally if you are setting up an FTP server at home, you should configure it to use a specific "passive port" range (e g 50000-50999) and manually create